CVE-2025-9187
published 2025-08-19CVE-2025-9187: Memory safety bugs present in Firefox 141 and Thunderbird 141. Some of these bugs showed evidence of memory corruption and we presume that with enough effort…
PriorityP346critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.42%
34.4th percentile
Memory safety bugs present in Firefox 141 and Thunderbird 141. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 142 and Thunderbird 142.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | firefox | < firefox 142.0-1 (sid) | firefox 142.0-1 (sid) |
| mozilla | firefox | < 142.0 | 142.0 |
| mozilla | firefox | — | — |
| mozilla | thunderbird | < 142.0 | 142.0 |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
osv9.8CRITICAL
vendor_debian9.8CRITICAL
vendor_redhat9.8CRITICAL
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Red Hat
firefox: thunderbird: Memory safety bugs fixed in Firefox 142 and Thunderbird 142
vendor_redhat·2025-08-19·CVSS 9.8
CVE-2025-9187 [CRITICAL] CWE-119 firefox: thunderbird: Memory safety bugs fixed in Firefox 142 and Thunderbird 142
firefox: thunderbird: Memory safety bugs fixed in Firefox 142 and Thunderbird 142
Memory safety bugs present in Firefox 141 and Thunderbird 141. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 142 and Thunderbird < 142.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Memory safety bugs are present in Firefox 141 and Thunderbird 141. Some of these bugs showed evidence of memory corruption, and we presume that with enough effort, some of these could have been exploited to run arbitrary code.
Statement: Red Hat Product Security rates the severity of this flaw as determined by
Debian
CVE-2025-9187: firefox - Memory safety bugs present in Firefox 141 and Thunderbird 141. Some of these bug...
vendor_debian·2025·CVSS 9.8
CVE-2025-9187 [CRITICAL] CVE-2025-9187: firefox - Memory safety bugs present in Firefox 141 and Thunderbird 141. Some of these bug...
Memory safety bugs present in Firefox 141 and Thunderbird 141. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 142 and Thunderbird < 142.
Scope: local
sid: resolved (fixed in 142.0-1)
Mozilla
Mozilla Foundation Security Advisory 2025-64: CVE-2025-9187
vendor_mozilla·CVSS 9.8
CVE-2025-9187 [CRITICAL] Mozilla Foundation Security Advisory 2025-64: CVE-2025-9187
Mozilla Foundation Security Advisory 2025-64
CVE: CVE-2025-9187
Product: Firefox
Impact: high
Fixed in: Firefox 142
Mozilla
Mozilla Foundation Security Advisory 2025-70: CVE-2025-9187
vendor_mozilla·CVSS 9.8
CVE-2025-9187 [CRITICAL] Mozilla Foundation Security Advisory 2025-70: CVE-2025-9187
Mozilla Foundation Security Advisory 2025-70
CVE: CVE-2025-9187
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 142
GHSA
GHSA-6rqq-g95r-qrcc: Memory safety bugs present in Firefox 141 and Thunderbird 141
ghsa_unreviewed·2025-08-19
CVE-2025-9187 [CRITICAL] CWE-119 GHSA-6rqq-g95r-qrcc: Memory safety bugs present in Firefox 141 and Thunderbird 141
Memory safety bugs present in Firefox 141 and Thunderbird 141. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 142 and Thunderbird < 142.
OSV
CVE-2025-9187: Memory safety bugs present in Firefox 141 and Thunderbird 141
osv·2025-08-19·CVSS 9.8
CVE-2025-9187 [CRITICAL] CVE-2025-9187: Memory safety bugs present in Firefox 141 and Thunderbird 141
Memory safety bugs present in Firefox 141 and Thunderbird 141. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 142 and Thunderbird < 142.
No detection rules found.
No public exploits indexed.
2025-08-19
Published